Transmission and speed-control device



Jul 6 192's. 1,591,256

A. ZANELLA TRANSMISSION AND SPEED CONTROL DEVICE ATTOR EY. 7

flpqllogzl Zanella.

Jul 6 1926. 4 1,591,256

A. ZANELLA TRANSMISSION AND SPEED CONTROL DEVICE Filed April ,30, 1923 3SheetsSheet 2 \I S Q \JQ July 6 1926. 1,591,256

A.ZANELLA TRANSMISSION AND SPEED CONTROL DEVICE Filed April 30. 1923 3Sheets-Sheet 3 INVENTOR.

Bfaouorfi Zanella w A TTORNEY.

Patented July 6, 1 926." I

" hPoLLonY :ZANELLA, "or FDETROITI v TRANsMIssIoN Am-e mmcmmommee;

A li ations-menial e0, r9231 'se vi-ai ito. 6355585 My invention relatesto se new and fusefuii improvement in a transmission endf jspeed'tcontrol a-nd has for its Ob ect"uhe prov sion:.

vision in a vehicle of means for transmitting power to the rear-- wheelsthemeof end: affording a positive drive to one {oi said wheels aectiveof the speed Off-Otaj'ilOli of the otherof said wheels.

Another object of the "invention is the pro'-- vision of s a powertransmitting device 'haw 111g .a rotating? body with surfaces adaptedfor moving in different planes esfithe rotas tion proceeds and means forin'oving' the driven meinbers relatively of the surface of said rotatingbody. s I Another objectof the invention isthe pro vision in a-device ofthisclziss of a rotating: means adapted for a ctuzrting wpair of reci-procating members and-jemb'odyingm set; of pawls aiidhaving mearisfor releasing said wpawls preliminary to 22m shiftin of saidreciprocating means for reversing't -e direc-- tion oif the drivenparts. V f

' Other objects will :zippear hereinafter:

The inventionconsists in the combination? Vand= arrangement of partshereinafter described andclaimed.

The invention will be part o-f-this specification b'odying theinvention, 9

Fig." 2 is a side eleviational-viewtakenon substantially line,=22 'ofFigjl,

'- F g. 3 is View takenon substenti-a llv line3-8 offFig. 2showingypartsin 'section I g enmor pitman 32 whichjis provided adje-g vcent oneend-fvithfa, slot- 33 in whi'ch' rid'esenut-34-;which-js"mounted on eshaft 35,1 which is provided with Fenexteriorthread? fori co-operation with -=t l1e interior thread of;- 1thenut The shafti35fis'journeled'in suit; abl'beerings-QG and -j3f7whieh-fare niounted10 Ont he beam118. -l-h epi tman 32is pljovidd' andparts elevation,

stantially 1ine*5-5-of Fig; 2,

s Fig. 6 is'a side *elevational view {oft-he} ratchet and pawls; used.in the 'zlliVel'lt lQIl f taken on -line 6 +-6 of-Fig, 5. v v -Fig.,7 is21' lperspectivevview of the pawl operating device used inthe invention,and

- Fig. 8 is a side elevational view-of a-modi fied form of wheel used-intheinvention. Fig 9 is a sectional v-iew-taken through;

Fig; 6.

1 best. understood from a reference to theeccompanyingdraw-5' ings whichform a and in which, e

. Fig-1 is a top'planviewof a device em-J 't and attached t0;tl-1e-beam18 1s aIi I-be'ennor bar 28 the lower endof which -,is attached 95 Theinvention-is res-atewheelie.

adapted to nove in irregulaniplaznes to give a oztm' efleot soaasfto"-reciprocate nrenibers 65, which are designed to 'ectuzttetheimmediate" driving mechanism which .is attached to the driven'sh'ait.'-l

I A The inventi'on, inits pneiierred form, com

prises- Le frame I formed yfrorngI-beams 1-5., 316, 17 :an-d l'8,- whi'ch*are joined tegethe'r raxt their ends in any convenient andsuhstanfiialmane ner.; Tour1'i aledi1 1 beari ngs lfiand-20; which 1 f"are imountedon saidfife' in wis e shaft 21'," p i c fixedlyfimountedz'a wheel 7 I having 'hub 22 through; which "the I ishaz'fitprojectsandwhic'h I is k-eye-d or. aotherwisesecured tosziid'shait; Thefacesl'of xthmwheel are provided at "their: center-with a: portionoi thesu-r iiace; 2'6, which};.extends'iventically- B to the shaft passingthrou-g'h the wheel; This portion 26is what isitermed;hereinaftenfthe lneutral portion' or-azone. The faeeedith:"

wheel foutside of this neutral zone is divided into two portions; theportion 1-24 fon min-gas an incline rising-tea point or plane removedfrom the p la ne of the neutral, Jzonesuific ent;

- distance to permit the portion 25-w ich'finl Y olineswdownwardly-tothe oniginal eto;

take an iabrupt'jv dropg; The-rising ppntionfie 9,0 of the wheelembraces about four-fifths of the wheel thewabru ptly slopingportion theother fifth. Projecting outwerdlyyfrom to: the housingi28, Mounted onthe mem; her 28, ad-jacentt heiend thereo-fis aaguidemember '29.; Aframe :30 is mounted-on an with 12, longitudinallyextending %'slotthroughfwhich' proj'ects'a' stud-AO whYieh Jis V I mounted on thenut34,5" a'S'TQ prevent-the nutiroin turning when-the-shafit 35 is turnedand at the same time to permit recipnocetion of the pitnian e .Mounteden theshaftfie is e 1 7 adapted for engagement with the other surface ofthe wheel 23.

The pitman'32 is pivotally mounted at 45 to a lug formed on a guidemember 46, said 1 member having another lug 49 which ispositionedbetweenoand pivotally mounted to a bifurcation 50 of an arm 51which is provided with bifurcations formed into rack bars 52 and 53.

1A second pitman 55 is provided with a frame 54 provided with bearingsand rollers as is the frame 30. The pitman 55 is also provided with anelongated longitudinal slot 56 in which rides a stud 57 mounted on thenut 58 which rides in a slot formed in the pitman and'is threaded upon.the shaft 35, the construction andarrangement of these parts being asalready described for the. 'pitina'n 32. The pitman 55 is pivotallymounted at 59 to a lug which projects f1 om the guide 60 which isprovided with a lug 63 which is positioned between and pivotally mountedto a bifurcatedlug or end 64 of an arm 65 which is bifurcated 'at itslower end to form rack bars'66 and 67 similar to the rack bars'already,described.

The guide member 46 isprovided'with a I dove-tailed tongue 47'adaptedfor engagement, slidably in a dove-tail groove 48 formed in theguide 29. "The guide 60 is also provded, with a dove-tailed tongueadapted for slideable movement in'the dovetailed groove 62 formed in theguide 29, thistongue 61 and the tongue 47 being in- 7 tegral with thebodies from which they proj'ect. Mounted upon the, housing, at oppositesides thereof, are tubular guide members 67 and 68, Projected throughthe member 67- and into the interor ofthelmusing 28 is a shaft or rearaxle ofthe vehicle, mounted upon the axle 69' is a housing or drum'70.Pivotally mounted upon the drum 70, by means of bolts: 71 are aplurality of dogs 72 having an under beveled surface7 3 adjacent theend. Projecting outwardly from the drum, and integral therewith is hub74 which is fixedly attached or made integral with i a gear'75 which isalso loosely positioned on the axle. Mounted p the hub 7 4, slidable'relatively thereto, is an' annular member 76 carrying a numberof wedgeshaped members 77, each of which is pro vided witlra' beveled surfaceadjacent its 1 end and adapted to project throughthe wall of the housingor drum so that the beveled surface 78 may engage the beveled surfaceLoosely of the dogs or pawls forraising in the same into inoperativeposition. The wall of the drum is provided with a number of recesses 80on the inner surface thereof, for the accommodation of the pawls 7 2whenmoved to inoperative position, a spring being positionedin the recessesformed in the wall 7 9 to maintain said pawls normally in opera tiveposition, said pawls when moved to inoperative positionserving tocompress the springs 81. Mounted fixedly onthe shaft 69 is a ratchet 82,with the teeth of which the pauls 72 engage when in normal'position.Another drum 83 is loosely mounted on thesha'ft 69 and provided with ahub 84 which is attached to and preferably made in tegral with the gear75. An annular mem ber 85 is loosely mounted on said hub and providedwith outwardly extending wedges 86 adapted to project through the wallof' the drum 83 and to engage another set of pawls 87 which are adaptedto engage, when in normal position with the ratchet 88 fixed ly mountedon the shaft 69. The pawls 87 areeach provided with a beveled surfaceand the ends of the wedges are tapered as are the wedges 77 so that thesame may serve to liftthe pawls free from the ratchet 88.

Projecting through the housing at the opposite side thereof is anothershaft or axle 69' which extends through thetubular guide. 68. Anotherpair of drums 83 and 70 are also mounted loosely on the shaft 69 andprovided with the same mechanism as already described as beingassociated with these drums, the drums and associated mechanism beingthe same at opposite sides of the vehicles, the rear axle of the vehiclebeing in two separate parts 69and 69"; a

A yoke 87 is slidably mounted in the housing and is provided with legs90, 91, 92 and 93 which project therefrom and are formed substantiallysemi-circular, each being pro vided witha channel 94 in which the ring76, 85, 76 or 85 engages. Mounted in the housing are supporting membersor brackets 95 and 96 in which is supported an arbor 97 and projectingfrom which are arms 98,

99, 98 and 99, eachof said arms being provided with a roller 101 adaptedto engage the surface of a rack bar, FiXedly mounted on the arbonisanarin' 102 the free end of which isjprovided with a slot extendinglongitudinally thereof, said slot 103 having a stud 104 riding thereinwhich projects from a lever 105. A bell crank 106 is mounted pivotallyon the wall of said housing and spaced therefrom by a suitablespacer107.

A stud 108 connects one end of said bell crankto the lever by means of astud which projects therefrom and rides in an elongated slot formed insaid lever, said slot being of considerably larger diameter than saidstud so as to allow plenty of play of the same in the slot. The otherend of when in engagement with said gear, serving for rotating said gearin the opposite direction, and means operable at will forinoving saidpawls to operative and inoperative position. o

2. Ina device ofthe class described, a

7 pair of axles, a ratchet fixedly mounted on eachof said axles, a setof pawls for rotating each of said ratchets; a gear for "rotating said pawls; a pair of rack bars for rotating said gear, one positioned on oneside of said gear and the other on theother side ofsaid gear, one, ofsaid rack bars, when in engagement with said gear, serving for rotatingthe '15 same in onedirection and the other, when in engagement with saidgear, serving for rotating said gear in the ,opposite' direction andmeans operable at will and moving said pawls to operative andinoperative position,

and means for reciprocating said rack bars for eflecting a rotation ofsaid gear,

3. In a devicefof the classdescribed, a pair of axles, a ratchet fixedlymounted on each of said axles; a set of pawls for rotating each of saidratchets; a gear for rotating said pawls; a pair of rack bars forrotating said gear,-one positioned on one side of said gear and theother on the other side of said gear, one of said rackbars, when inengagement'with said gear, serving .for rotating the same in onedirection and the other,when in engagement with said gear, serving forrotating said gear in'the opposite direction; means operable at will formoving said pawls to operative and inoperative position; means forreciprocating said rack. bars for effecting a rotation or said gear, oneof said rackbarsbeing operative during movement in onedirection and theother being operative during movement in the opposite direction;

4. In a device of the class described, a pair of axles, a ratchetfixedly mounted on each of said axles a set of pawls for ro-' tatingeach of said ratchets; a gear for rotating said pawls; a pair of rackbars for rotating said gear, one positioned on one side of said gear andthe other on the other side of said gear, one of said rack bars, when inengagement with said gear, serving for r0 member'hav'ing a cam bearingsurface forefi'ecting reciprocation of saidrack bars.

In testimony whereof I have signed the foregoing specification.

APOLLONY ZAN LLA. V

